20.500.12556/DiRROS-29552 Microstructural engineering of sodium potassium niobate for enhanced and temperature-stable electromechanical response The development of high-performance lead-free piezoelectrics is a critical step toward sustainable electronic components, yet matching the electromechanical stability over external variables, such as temperature, of lead-based standards remains a significant challenge. This study investigates the synergistic effects of Ti-doping and K5.4Cu1.3Ta10O29 (KCT) co-modification on the structural and functional properties of (K0.5Na0.5)NbO3 (KNN) ceramics. Co-modification significantly enhances both electromechanical coupling and the mechanical quality factor, parameters essential for ultrasonic transducer applications. A comparative analysis of the ferroelectric behavior reveals that these modifications establish a stable internal bias field leading to the hardening of piezoelectric properties. Interestingly, the samples modified solely by Ti exhibit a stronger internal bias field than the Cu-containing co-modified samples, a phenomenon further explored through domain imaging. When benchmarked against commercial hard PZT, the optimized KNN-Ti-KCT ceramic demonstrates comparable thermal stability in the room-temperature to 100°C range. Although a trade-off exists between peak piezoelectric coefficients and environmental impact, these results highlight the potential of tailored KNN ceramics as reliable lead-free alternatives for high-temperature electromechanical devices. electronic ceramics piezoelectricity electromechanical stability elektronska keramika piezoelektričnost elektromehanska stabilnost true false true Wiley Združeno kraljestvo Angleški jezik Slovenski jezik © 2026 The Author(s). Neznano 2026-05-25 13:18:21 2026-05-25 13:18:21 2026-05-26 03:49:10 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorji: Janina Roknić, Nejc Suban, Katarina Žiberna, Silvo Drnovšek, Brigita Kmet, Aadil Abass Shah, Marko Robić, Hana Uršič, Tadej Rojac, Andreja Benčan Golob, Barbara Malič; Opis vira z dne 25. 5. 2026; str. 1-12 iss. 3, [article no.] e70201 Vol. 23 Jun. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-03-27 2026-04-30 2026-05-20 621.7+621.9 1744-7402 10.1111/ijac.70201 279220483 https://ceramics.onlinelibrary.wiley.com/journal/17447402 1 722c50fc-582b-11f1-8a5a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44341 RAZ_Bradesko_Andraz_2026.pdf RAZ_Bradesko_Andraz_2026.pdf 1 606997C8ABF6BB7406C267E9C31BCC69 97baf7ac0c3a5274f9dc07f279108b41d25421c382af9eaf07bbb99561bc0981 62c8a1ec-582c-11f1-8a5a-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44345 Institut Jožef Stefan 0 0 0